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化学试验器皿工安全操作规程 | 2011-2-13 9:19:00
1不知其性质的试样,绝不可放进加热。
2除铂头坩埚外,其它坩埚不可坩铂器皿。
3铂器皿必须在煤气灯氧化焰上灼烘和加热不能在还原焰上烧,以免生成脆弱的碳化铂。
4铂器皿放于高温炉内加热时,必须先扫清炉膛,以免炉膛内之赃物沾污坩埚,铂器皿在电炉内加热正蒸发时,必须垫以清洁而固定使用的石棉板,不准垫铁制物品,不准乱拿脏的石棉板垫放。
5在铂坩埚内熔融试剂,不允许使用过氧过钠、过氧化钡、硫代硫酸钠、碱金属(钾、钠)的硝酸盐,亚硝酸盐、氢化物及氧化物,碱土金属(钙、镁、钡)氢氧化物。
.6为了避免铂由于和其它金属生成合金以及生脆弱的铂化物而损坏,不可在铂容器内烧灼和加热以下物质:
a. 易被还原金属及盐类如:铅、锌、铬、锑、锡、银、汞、钕金属等类。
b. 避免与金属铁作用,以免生成铁铂合金,因此当含金属铁样品需熔融时,必须用酸先将大部分铁熔后,再将不熔物放于铂坩埚中熔融。
c. 容易被还原的金属化合物,硫酸铅、氧化铅、二氧化锡、三氧化二铋和三氧化二铁等。
d. 含磷和硫砷的化合物,磷酸铝、硫化锰等。
e. 盐酸与高锰酸钾或重铬酸钾不能混用。
7使用是必须防止器皿的变形、磨损、减重,因此:
a. 不得用无橡皮头之玻璃棒处理玻璃器皿内熔融物。
b. 铂在
8在铂坩埚内灰化滤低时,必须在低温下进行,并应充分氧化以免有还原性之碳化物与铂作用。
9弄污了的氰铂容器应采用以下方法清洁:
a. 在不含硝酸的盐酸中加热,如盐酸已变深为黄色,则必须另换新的。
b. 用上法不能处理清洁时,则以重铬酸钾熔融处理。
c. 上法不行时,用焦硫酸钾。
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http://www.esafety.cn/blog/u/9490/archives/2012/119964.html
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http://www.esafety.cn/blog/u/20773/archives/2010/103373.html
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